Hahahaha, I work for GfK. There's a very good chance I personally mailed this. This is not a scam at all. We do market research for a lot of companies like Google, Gerber, GE and others. We've sent out products to test like plastic baggies and those crunchy bottles that some water companies use. One of our surveys is for doctors and their checks are HUGE. Some people win iPads for doing surveys. We used to be knowledge networks but recently merged with GfK. Look at BBB for Knowledge Networks. A+ rating.